Class 12 Exam > Class 12 Notes > MCQ: Paramagnetism of Ions, Chemistry -Class 12
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Among the following which one has the highest paramagnetism?a)[Zn(H2O)6]2+b)[Fe(H2O)6]2+c)[Cu(H2O)6]2+d)[Cr(H2O)6]3+Correct answer is option 'B'. Can you explain this answer?
Ref: https://edurev.in/question/542974/Among-the-following-which-one-has-the-highest-paramagnetism-a-Zn-H2O-6-2b-Fe-H2O-6-2c-Cu-H2O-6-2d
(i) No. of unpaired electrons in [Cr(H2O)6]3+ = 3
(ii) No. of unpaired electrons in[Fe(H2O)6]2+ = 4
Then, μ
(iii) No. of unpaired electrons in [Zn(H2O)6]2+ = 0
Hence, [Fe(H2O)6]2+ has the highest paramagnetism value.
FAQs on MCQ: Paramagnetism of Ions, Chemistry -Class 12
| 1. What is paramagnetism? |  |
Ans. Paramagnetism is a property of certain materials that are weakly attracted to an external magnetic field. These materials have unpaired electrons, which align their magnetic moments in the direction of the applied field, resulting in a net magnetic moment.
| 2. How do ions exhibit paramagnetism? | |
Ans. Ions can exhibit paramagnetism if they have unpaired electrons. When an ion is placed in a magnetic field, the unpaired electrons align their magnetic moments with the field, causing the ion to be attracted to the field. This alignment is temporary and disappears when the magnetic field is removed.
| 3. What factors affect the degree of paramagnetism in ions? | |
Ans. The degree of paramagnetism in ions can be influenced by various factors, including the number of unpaired electrons present in the ion. The more unpaired electrons an ion has, the stronger its paramagnetic properties. Additionally, the strength of the applied magnetic field can also affect the degree of paramagnetism.
| 4. How is paramagnetism different from diamagnetism? | |
Ans. Paramagnetism and diamagnetism are two types of magnetism, but they differ in their behavior towards an applied magnetic field. While paramagnetic materials are weakly attracted to a magnetic field due to the alignment of their unpaired electrons, diamagnetic materials are weakly repelled by a magnetic field due to the induced magnetic fields created by paired electrons.
| 5. Why is paramagnetism important in chemistry? | |
Ans. Paramagnetism plays a crucial role in various areas of chemistry. It helps in the identification and characterization of different compounds by studying their magnetic properties. Paramagnetic compounds are often used in magnetic resonance imaging (MRI) and other magnetic-based techniques for medical diagnosis and research purposes. Additionally, paramagnetic ions are involved in many chemical reactions and catalytic processes.
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